S24SA2R510NRFB データシートの表示（PDF） - Delta Electronics, Inc.

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S24SA2R510NRFB

Delphi Series S24SA, 2”x1” Family DC/DC Power Modules: 18~36Vin, 1.2V, 12A out

Delta Electronics, Inc. 

THERMAL CONSIDERATIONS

Thermal management is an important part of the system

design. To ensure proper, reliable operation, sufficient

cooling of the power module is needed over the entire

temperature range of the module. Convection cooling is

usually the dominant mode of heat transfer.

Hence, the choice of equipment to characterize the

thermal performance of the power module is a wind

tunnel.

Thermal Testing Setup

Delta’s DC/DC power modules are characterized in

heated vertical wind tunnels that simulate the thermal

environments encountered in most electronics

equipment. This type of equipment commonly uses

vertically mounted circuit cards in cabinet racks in which

the power modules are mounted.

The following figure shows the wind tunnel

characterization setup. The power module is mounted

on a test PWB and is vertically positioned within the

wind tunnel. The space between the neighboring PWB

and the top of the power module or a heat sink is

6.35mm (0.25”).

Thermal Derating

Heat can be removed by increasing airflow over the

module. The module’s maximum hot spot temperature is

To. To enhance system reliability, the power module

should always be operated below the maximum

operating temperature. If the temperature exceeds the

maximum module temperature, reliability of the unit may

be affected.

THERMAL CURVES

Figure 18: Hot spot temperature measured point

＊The allowed maximum hot spot temperature is defined at 110℃

S24SA1R212NR (Standard) Output Current vs. Ambient Temperature and Air Velocity

Output Current(A)

(Either Orientation)

12

10

Natural

Convection

7

100LFM

200LFM

5

300LFM

2

0

50

55

60

65

70

75

80

85

Ambient Temperature (℃)

Figure 19: Output current vs. ambient temperature and air velocity

(Either Orientation)

FACING PWB

PWB

MODULE

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

AIR FLOW

50.8 (2.0”)

10 (0.4”)

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

Figure 17: Wind tunnel test setup

9

DS_S24SA1R212_05102006

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